Account Freeze and Lock State Detector

[Kingsman-99]

Description

A Stellar account can be prevented from transacting by an issuer revoking authorisation (freeze) or by being flagged AUTH_IMMUTABLE in a state that prevents future authorisation. Sending payments to or from such accounts results in submission failures that are difficult to distinguish from other errors. A detector should identify accounts in a frozen or effectively locked state before any payment operation is attempted.

Technical Context

Add src/accountStateDetector.ts. Reads TrustLineRecord.authorized and TrustLineRecord.authorized_to_maintain_liabilities from @stellar/stellar-sdk Server.loadAccount(). Inspects AccountRecord.flags.auth_revocable and auth_immutable. Integrates with src/preflightChecker.ts. Adds AccountLockState to src/types.ts. Throws AccountFrozenError or AccountLockedError from src/errors.ts as appropriate.

Acceptance Criteria

• detectLockState(accountId: string, asset: Asset): Promise<AccountLockState> returns { isFrozen, isLocked, trustlineAuthorized, reason? }
• Detects frozen trustline by checking authorized: false and authorized_to_maintain_liabilities: false on the matching trustline
• Detects issuer-side AUTH_REVOCABLE flag that would allow future revocation and includes it in the report as { revocableByIssuer: true }
• src/preflightChecker.ts calls detectLockState() for each recipient and blocks payment if any account is frozen
• Unit tests mock account records for: fully authorized, frozen (authorized: false), and locked (immutable) scenarios
• All CI checks (npm test, npm run build, ESLint/TypeScript) pass and the branch has no merge conflicts

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[probablyABug]

@probablyABug has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

hi, i would like to work on this.

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[directorfloo]

@directorfloo has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I would love to work on this issue expertly, please assign it to me

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[EA10-lite]

@EA10-lite has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

Hi! I'd like to work on this issue. I have 3+ years of experience building TypeScript applications and integrating with the Stellar ecosystem, including account validation, payment flows, and robust preflight checks. I estimate this will take about 6 hours to implement, thoroughly test, and validate. I'll implement the account lock state detector, integrate it into the preflight checker, add comprehensive unit tests covering the required scenarios, and ensure all CI checks pass before submitting a PR.

ℹ️ Repo Maintainers: To accept this application, review their application or assign @EA10-lite to this issue.

[CHEF-SAVY]

@CHEF-SAVY has applied to work on this issue as part of the Stellar Wave Program's 7th wave.

I can work on this.
Please assign

ℹ️ Repo Maintainers: To accept this application, review their application or assign @CHEF-SAVY to this issue.

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Congratulations, @CHEF-SAVY! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on July 30, 2026.

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[grantfox-oss]

🎉 This issue has been marked as completed on GrantFox!

@CHEF-SAVY's PR #600 was approved and merged by @Kingsman-99.

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👏 Great work, @CHEF-SAVY! Keep contributing to Stellar-split.

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This issue has been completed by @CHEF-SAVY as part of the Stellar Wave Program's 7th Wave 🥳

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